When I was in Supply Management, we tried to come up with a  size that would be cost effective no matter
who the supplier was but found that this was only a useful idea in theory.  The various tooling systems and
coupon requirements (some suppliers put a coupon on all product and some do not, some use the full IPC
coupon and some just add a few drilled holes on the  edge of the production panel) in addition to the
number of available production panel sizes our suppliers had available etc. etc. made this impossible.

Seth Goodman wrote:

> I have often been told to allow a 1" on the panel by board vendors, but some
> additionally tell me one edge must have a 2" border for various coupons.
> Does this pertain to the class of fabrication or is this just a preference
> among some board fabricators?
>
> Seth Goodman
> Goodman & Associates
> 7687 Leta Way
> Verona, WI 53593
> Tel (608)833-9933
> Fax (608)833-9966
>
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]]On Behalf Of Anne Ledger
> > Sent: Tuesday, January 05, 1999 12:28 PM
> > To: [log in to unmask]
> > Subject: Re: [TN] Two up on panel
> >
> >
> > Dennis,
> > As a board vendor, our basic rule of thumb is to maintain a 1" minimum
> > border on the panel with  minimum spacing at just enough to accomodate a
> > router bit but preferred at .2 or better.  There is also the option of
> > scoring the two boards apart, leaving even less than the router bit
> > width.  Different tooling systems can dictate the available useable
> > space within the panel, which explains the difference among your
> > vendors.
> >
> > Anne Ledger
> > Manufacturing Engineering
> > EMDS, Inc.
> > [log in to unmask]
> >
> > > -----Original Message-----
> > > From: Dennis Ward [SMTP:[log in to unmask]]
> > > Sent: Tuesday, January 05, 1999 11:06 AM
> > > To:   [log in to unmask]
> > > Subject:      [TN] Two up on panel
> > >
> > > Good morning everyone,
> > >
> > > Hope everyone had a great New years. Quick
> > > question. On a 18 X 24 panel what is the maximum
> > > size of an individual board and still get TWO boards
> > > per panel? Please no "contact your board vendor"
> > > replies. I have documentation for four different
> > > vendors and each has something different. And I
> > > understand that each will be different. I am curious
> > > how these vendors stack up with the rest of the
> > > industry. I've seen sizes from 16.00 X 10.90
> > > (the smallest) to 16.50 X 11.20 (the largest).
> > >
> > > What is realistic? Is the 16.00 X 10.90 too
> > > conservative and the 16.50 X 11.20 too large??
> > >
> > > Thanks for the replies
> > > Dennis
> > >
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